Knob attachment



(No Model.)

G. VAN WINKLE.

KNOB ATTACHMENT.

No. 320,602. Patented June 23, 1885.

IleuTen STATES PATENT OFFICE.

GARRET VAN \VINKLE, OF NORTH PLAINFIELD, NEWV JERSEY.

KNOB ATTACHM ENT.

SPECIFICATION forming part of Letters Patent No. 320,602, dated June 23, 1885.

Application filed October 16, 1884.

To mZZ whom it may concern.-

Be it known that I, GARRET VAN WINKLE, of North Plainfield, in the county of Somerset and State of New Jersey, have invented an Improvement in Knob Attachments, of which the following is a specification.

Knob-shanks have been made of metal and the handles of wood, porcelain, glass, and other materials, and the knob has been provided with a dovetailed recess for the reception of the end of the shank. In these cases it has been necessary to employ lead or cement to hold the end of the shank into the knob.

My invention is made for the purpose of fastening the shank and knob together in a very strong and reliable manner, and for dispensi ng with melted lead or similar material for holding the shank into the dovetail recess or mortise of the knob.

In the drawings, Figure 1 is a section of the knob and shank complete. Fig. 2 is an end View of the knob-shank, and Fig. 3 represents the shank-sections separately.

The knob A is to be made of wood, glass, porcelain, metal, or other suitable material, and it is either round, oval, or polygonal. There is in one side a recess or mortise with two or more of its faces undercut or formed as dovetails, and the shank is made in'two or more parts-that is to say, there are by preference two shank-sections, B and G, and a tubular cover, D.

Two sections and a cover or ring have been used; but they had to be cemented or leaded into place. I avoid this by making the outer surfaces, 6, of the shank ends at an inclination or dovetailed corresponding to the interior shape of the dovetailed or undercut mortise; but the shank end is parallel, or nearly so, in its inner and outer faces, instead of being widest at the outer end, as heretofore. In consequence of this parallel form each shank end can be inserted into the mortise or recess with facility, the outer parts of the two shank-sections standing divergently to each other, as shown by dotted lines in Fig. 1. After this has been done the shank-sections are pressed together, and in so doing the dovetail portions are forced powerfully apart at their ends with- (No model.)

against the sides of the said recess or mortise and hold the shank and the knob together. To secure the parts in this position it is only necessary to slip a tubular cover or sleeve, D, over and around the shank-sections.

It will be apparent that in placing the shank-sections in position and spreading the dovetailed portions by closing the outer ends of the sections the shank-sections act as 1evers, the fulcrum being at 'i, where the two sections touch each other. Should there be looseness of the shank in the dovetail recesses, it is easily rectified by introducing one or more thicknesses of paper or other material between the knob and the lever ends. If desired, plaster-of-paris or other cement may be introduced into the recess before the shank ends are entered and spread apart.

It is usually preferable to employ a tubular cover or sleeve that is slightly tapering, in order that it may tighten upon the shank as it is forced on and prevent the sleeve becoming loose when the knob is in use. This sleeve may also be held more securely by the cross pin or screw it usually passed through the spindle.

If the surfaces of the shank-sections are properly finished, the screw or rivet it alone may be depended upon for holding the parts of the shank together. The adjacent surfaces of the shank-sections may be made with interlocking projections and recesses, as at 2', Fig. 3, and there should be a rib or bead, Z, around the shank-sections to bear against the surface of the knob and prevent the dovetailed portions passing too far into-the recess.

I claim as my invention- 1. The combination, with the knob having an undercut or dovetailed recess, the shanksections B 0, having diverging or angular ends to be passed into the dovetailed recess and opened out by closing the outer parts of the shank-sections, and means for holding such sections together, substantially as set forth.

2. The combination, with the knob having an undercut or dovetailed recess, of shanksections with diverging or angular ends passed into the dovetailed recess, and a sleeve Signed by me this 9th day of October, A. D. 1884.

GARRET VAN WINKLE.

\Vitnesses:

CHARLES P. LEGGETT,

JOHN H. VAN VVINKLE. 

